Superheater.



J. PRIMROSEL SUPEBHEATER.

- APPLICATION FILED/JULY 10, 1912.

1,076,315. Patented Oct 21,1913.

mm nroz which the following is a full.

connected; and to e plates the use of a plurality of TQHN PRIMROSE, OF NEW YORK, N. Y.

SUPERHEA'IER.

Specification 01' Letters Patent.

Patented Oct. 21, 1 913.

lpptieation filed Jwlly 10, 1912. Serial No. 708,602.

To all whom; it m, concern.

Be it known t at I, JOHN P Mitosis, .0:- Subject of the I siding at New York in the county and State of New York, have Invented certain new and useful Improvements in Superheaters, of clear; and ex-' act description.

The invention which forms the subject matter of this application relates to a novel form of superheater for boilers.

In order to obtain the highest efficiency in a superheater it is necessary to provide for a"certain' amount of flexibility between the different parts, to employ means for draining the superheater when desired and to.

make the arrangement such that the headers and the superheating elements can be readily cleaned. Y

The principal objects of this invention therefore are to secure greater flexibility by employing separate inlet and outlet headers; to effectively drain the entihe superheater by providing a distributing header at the bottom to which a drain pipe may be readily Heat a more efiicientcleaning of the superheater by employing straight elements between the inlet and out let headers on the one hand and the distribu ting header or headers on the other. In this connectiorr it may besta'ted that in using straight-elements the amount of space occupied in the boiler is substantially less than that occupied by U-bends while at the same time the area of the superheating surface is maintained at a maximum.

. In addition my invention also contcmdistributing headers at the bottom whereby not only the features above are attained but makes it possible to connect the bottom headers with superheating elements in order to increase the ,efliciency as a superheatcr.

Other objects and advantages of the invention will appear from the description below taken in connection with the accompanying drawings wherein is ferred embodiments which,

Figurel is a cross-section of a sterling boiler to which my superb;- tter has been applied. Fig.2 is a section howing the distributing header at the lower end of the superheating elements. Figs. 3 and 4 are views similar to Fi S. 1 and 2 but showing a construction wherein two distributing head- Kingof Great Britain; re- 3- ers are utilized at the bottom and connected gtO' each other by U-bends.

' Referring to the drawings in detail, and in particular Figs. I and 2, the reference character 10' designates a boiler setting of usual construction provided with a plurality of u pper'drums I1, 12 and 13 and with a lower or'mu'd drum 14 the former being connected to the latter by banks of tubes as shown at 15' 16 and 17. The said drums are preferably arranged transversely of the boiler setting. Connecting the drums 11 and 12 is a plurality of circulating tubes 18. These circulating tubes ared'ivided-asshown and located above the lower set. The baffle 19 may be utilized to protect the inlet and outlet headers 2 and 21 from the extreme heat at this point to which they would otherwise be subjected. The inlet headers are connected to the steam space of the drum 12 by means of the pipe 22. Circulating tubes 23, similar to circulating tubes 18, are empl'oyed to connect the drums 12 and 13'.

As before stated the inlet and outlet headers 20 and 21 are located above the bafile' 19' andto these headers are connected one of the ends of superhcating elements 24:, 25 respectively, while the lower ends of these elements are connected to a common or continuous distributing or return header 26, It will therefore be apparent from the construction just described that straight superheating elements 24 and 25 can be used exclusively in lieu of the U-shaped elements now in vogue. These straight elements not only permit the same to be more readily cleaned which is a distinct advantage over the bent shown the preof the invention and m tubes, but also allows the use of a distributer connected thereto to afford draining means for the superheater. Another important feature of the construction is the fact that greater flexibility is attained.

Referring to the modified form shown in Figs. 3 and 4: it will be noted that I employ one inlet and one outlctat the top and a plnrality of distributing headers 26 at the bottom. It will be apparent that the ad vantages accruing from the arrangement shown in Figs. 1 and 2 are obtained also in the modified form shown in Figs. 3 and 4. In addition I provide auxiliary superheater elements 27 which materially increase the heating surface of the snperheater upon which the degree of superheat depends, and also increases the travel of the steam, at the same time breaking up the currents of steam passand adapted to (.01

ing through the-superheater and thereby insuring a better mixture and a more uniform superheat. As shown the cast iron preteetion it used is omitted from the superhcater elements where they pass between the incite-r tubes, as indicated at 28a The drain {or the lower distributing header or headers indicated at 29.

It is to be understood that I make no claim to the boiler setting per 50, but simply chose the specific construction shown with. wiow tmelucidate the y inciples or Pay invention in combination with one specific type of boiler; and it to be understood that minor details as to the tUHStlUCllQIl and design may be resorted to in connection with the superheater without departing from the true s irit and scope as defined by the appended claims.

What I claim is:

1. In, combination with a boiler, a superheater comprising separate inlet and outlet headers located at the top for the admission and discharge f steam and arranged transversely of the said boiler, one of said headers located in front of the other as regards the passage 05 gases through the furnace, a distributing header at the lower end of said super-heater ot'substantially the same length as said inlet and outlet header" 3, row of superheating elements connecting the inlet header at the u ppor end thereof with the distributing header at the lower end, and separate superheating elements for connecting the distributing header and the out-let header one row of said chwncuts being located in front of the other and {he ulivid ual super-heating elements of each. i con nected to the distributing header adjacent to each other.

2. In. combination with a boiler, a super-- heater coingiirisiug an inlet header at; i e top for the admission of steen'i to he su erhosted, a distributing: header at the lower end thereof, suhstanti Hy straigl'it super heating elem-c 4 co necting the said headers y the steam from the upper header to i distributing header, an outlet or discharge header for the supen heated steam at the upper end thercr, superheating elements connecting mentioned herler with the distributing" header and adapted to convey the stceni. rom the (llStEllf heads? to the said outlet. header, one of saiw group of superheating elements being located in front of the other and the inci idual superheating elements oi: each r0 connected to the distributlli, header adjacent to each other.

A superheater comprising separate inlet and outlet headers arranged substantially parailcl and located one in front of the other as rds the pa of gases therethrough, plurality of di ributing headers at; the lower end thereof similarly arranged,

lily strai 'ht superheating elements ting the inlet header with one of distributing headers, substantially t superhcatiug elements for connecting the outlet header with ,the other dis tributiug header, and superheating, tubes for connecting the distributing headers.

i; A superheatcr comprising separate inlet and outlet headers at the upper end thereof, a plurality of distributing headers at the lower end thereof, superheating elements for connecting the inlet header with one of said distributing headers and for connectino' the. outlet header with another of said distributing headers, and superheating elements mnniecting said. distributing head- In a suporheate'r comprising inlet and outlet headers at the upper end thereof separated from each other to allow for flexiliility, a plurality of distributing headers at the lower end thereof having tubes connected thereto for draining the superlieater, supcrhentcr elements connecting the upper and lower headers, and auxiliary superheatcrs connecting said distributing headers.

(5. In cmnbination with a boiler having a pmrality of drums, cireulating tubes connmzt-ing'said drums and a super eater comprising inlet and outlet headers located above said l'zirculating tubes, substantially aiiix: my signature 

